Mitral valve apparatus

The mitral valve apparatus is a complex, three-dimensional functional unit located between the left atrium and left ventricle of the heart. It includes the mitral annulus, anterior and posterior mitral leaflets, chordae tendineae, papillary muscles, as well as supporting atrial and ventricular myocardium[1][3][4][5][7][9]. Its main role is to enable efficient, unidirectional flow of blood from the left atrium to the left ventricle during diastole and to prevent backflow (regurgitation) into the atrium during systole[5][7][9]. It achieves this through dynamic interaction of its components: the annulus provides structural support; the leaflets act as flaps opening and closing with the heartbeat; the chordae tendineae and papillary muscles anchor and stabilize the leaflets, preventing prolapse or inversion[1][3][9][10]. Dysfunction of any element in this system can result in clinically important valvular diseases such as mitral regurgitation or prolapse[6][7]. The apparatus is a focus of diagnostic imaging and surgical repair in cardiology but is not a molecular drug target; thus, it is not described by canonical drug-target classification systems.

Other names

Mitral valve complexMitral valve systemMV apparatus